[name of former employee] is no longer an employee of this corporation and is therefore no longer authorized to act, in any form whatsoever, on our behalf.

I am requesting that this information be relayed to all of your department heads.

Yours Sincerely,

(The Sender's Signature)

The Sender's Name

NOTE :

This is a typical letter. You have to add your company's name with full address. And the receiver's name and full address also should be added in the place allotted for that purpose. Without those primary details no letter carries any significance. So, you are requested to provide all those important details. Failing which the letter will make a wrong impression about your company and you among the receivers of your letters. This is the most unwanted attitude on your side in dealing with the clients who are the most valued assets of any business organisation. If necessary, leave those spaces blank.